Inside the presidency

Pete Souza, The White House

President Barack Obama signs the prosthetic arm of Sgt. Carlos Evans, USMC, after greeting wounded warriors in the East Room during their tour of the White House, March 6, 2012. First Lady Michelle Obama first met Evans, who was injured in Afghanistan while on his fourth combat deployment, during a visit to Walter Reed Army Medical Center in 2010.

President Barack Obama signs the prosthetic arm of Sgt. Carlos Evans, USMC, after greeting wounded warriors in the East Room during their tour of the White House, March 6, 2012. First Lady Michelle Obama first met Evans, who was injured in Afghanistan while on his fourth combat deployment, during a visit to Walter Reed Army Medical Center in 2010. (Pete Souza, The White House)

President Barack Obama signs the prosthetic arm of Sgt. Carlos Evans, USMC, after greeting wounded warriors in the East Room during their tour of the White House, March 6, 2012. First Lady Michelle Obama first met Evans, who was injured in Afghanistan while on his fourth combat deployment, during a visit to Walter Reed Army Medical Center in 2010.